1220299656 has 32 divisors (see below), whose sum is σ = 3077753760. Its totient is φ = 403165952.

The previous prime is 1220299637. The next prime is 1220299657. The reversal of 1220299656 is 6569920221.

It is not an unprimeable number, because it can be changed into a prime (1220299657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222270 + ... + 227693.

It is an arithmetic number, because the mean of its divisors is an integer number (96179805).

Almost surely, 2^1220299656 is an apocalyptic number.

It is an amenable number.

1220299656 is an abundant number, since it is smaller than the sum of its proper divisors (1857454104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220299656 is a wasteful number, since it uses less digits than its factorization.

1220299656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450085 (or 450081 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 1220299656 is about 34932.7876929397. The cubic root of 1220299656 is about 1068.6172069613.

The spelling of 1220299656 in words is "one billion, two hundred twenty million, two hundred ninety-nine thousand, six hundred fifty-six".